@chassisjs/hermes/lib/utils/utils.test.js

Production-Ready TypeScript Outbox Pattern

import { expect, test } from '@jest/globals';
import { noop } from 'ts-essentials';
import { isNil, swallow } from './utils.js';
test(`noop is a function that does nothing`, () => {
    expect(typeof noop).toEqual('function');
    expect(noop()).toBeUndefined();
});
test(`isNil checks whether the value is null or undefined`, () => {
    expect(typeof isNil).toEqual('function');
    expect(isNil(null)).toBeTruthy();
    expect(isNil(undefined)).toBeTruthy();
    expect(isNil(0)).toBeFalsy();
    expect(isNil('')).toBeFalsy();
    expect(isNil(NaN)).toBeFalsy();
    expect(isNil({})).toBeFalsy();
    expect(isNil([])).toBeFalsy();
    expect(isNil('test')).toBeFalsy();
});
test(`swallow cacthes a sync function error and do nothing`, () => {
    swallow(() => {
        throw new Error();
    });
    swallow(() => 'some value');
});
test(`swallow cacthes an async function error and do nothing`, async () => {
    await swallow(async () => await Promise.reject(new Error()));
    await swallow(async () => await Promise.resolve());
});
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